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(Delphi DLL) WhatsApp - Send a Text MessageDemonstrates how to use the messages endpoint to send text messages to your customers. For more information, see https://developers.facebook.com/docs/whatsapp/api/messages/text
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, HttpResponse, JsonObject; ... procedure TForm1.Button1Click(Sender: TObject); var http: HCkHttp; success: Boolean; json: HCkJsonObject; resp: HCkHttpResponse; sbResponseBody: HCkStringBuilder; jResp: HCkJsonObject; respStatusCode: Integer; id: PWideChar; i: Integer; count_i: Integer; begin // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. http := CkHttp_Create(); // Implements the following CURL command: // curl -X POST https://example.com/v1/messages \ // -H "Authorization: Bearer your-auth-token" \ // -d ' // { // "preview_url": false, // "recipient_type": "individual", // "to": "whatsapp-id-or-group-id", // "type": "text", // "text": { // "body": "your-text-message-content" // } // }' // Use the following online tool to generate HTTP code from a CURL command // Convert a cURL Command to HTTP Source Code // Use this online tool to generate code from sample JSON: // Generate Code to Create JSON // The following JSON is sent in the request body. // { // "preview_url": false, // "recipient_type": "individual", // "to": "whatsapp-id-or-group-id", // "type": "text", // "text": { // "body": "your-text-message-content" // } // } json := CkJsonObject_Create(); CkJsonObject_UpdateBool(json,'preview_url',False); CkJsonObject_UpdateString(json,'recipient_type','individual'); CkJsonObject_UpdateString(json,'to','whatsapp-id-or-group-id'); CkJsonObject_UpdateString(json,'type','text'); CkJsonObject_UpdateString(json,'text.body','your-text-message-content'); // Adds the "Authorization: Bearer your-auth-token" header. CkHttp_putAuthToken(http,'your-auth-token'); resp := CkHttp_PostJson3(http,'https://example.com/v1/messages','application/json',json); if (CkHttp_getLastMethodSuccess(http) = False) then begin Memo1.Lines.Add(CkHttp__lastErrorText(http)); Exit; end; sbResponseBody := CkStringBuilder_Create(); CkHttpResponse_GetBodySb(resp,sbResponseBody); jResp := CkJsonObject_Create(); CkJsonObject_LoadSb(jResp,sbResponseBody); CkJsonObject_putEmitCompact(jResp,False); Memo1.Lines.Add('Response Body:'); Memo1.Lines.Add(CkJsonObject__emit(jResp)); respStatusCode := CkHttpResponse_getStatusCode(resp); Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode)); if (respStatusCode >= 400) then begin Memo1.Lines.Add('Response Header:'); Memo1.Lines.Add(CkHttpResponse__header(resp)); Memo1.Lines.Add('Failed.'); CkHttpResponse_Dispose(resp); Exit; end; CkHttpResponse_Dispose(resp); // Sample JSON response: // (Sample code for parsing the JSON response is shown below) // { // "messages": [ // { // "id": "gBEGkYiEB1VXAglK1ZEqA1YKPrU" // } // ] // } // Sample code for parsing the JSON response... // Use the following online tool to generate parsing code from sample JSON: // Generate Parsing Code from JSON i := 0; count_i := CkJsonObject_SizeOfArray(jResp,'messages'); while i < count_i do begin CkJsonObject_putI(jResp,i); id := CkJsonObject__stringOf(jResp,'messages[i].id'); i := i + 1; end; CkHttp_Dispose(http); CkJsonObject_Dispose(json); CkStringBuilder_Dispose(sbResponseBody); CkJsonObject_Dispose(jResp); end; |
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